SDR ASAA2022070439317

Service difficulty report · Skin · Boeing 737890

Difficulty date: July 4, 2022
Submitted: August 4, 2022
Operation: Air carrier
Aircraft: N562AS
Make and model: Boeing 737890
Aircraft serial: 35091
Aircraft time: 58,050 hours, 17,117 cycles
System (JASC): 5330 · Fuselage Main, Plate/Skin
Part: Skin
Part number: 148A3321
Condition: Corroded
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LOWER EXTERIOR FUSELAGE, AT LAV VENT, SKIN IS CORRODED BETWEEN VENT TUBE AND INTERIOR SKIN. GROUNDED - YES. REMOVED CORROSION FROM LOWER SKIN AT LAV VENT, ORIGINAL THICKNESS 0.125", WITH 0.005" REMOVED, AND 0.120" REMAINING, FOUND TO BE WITHIN LIMITS IAW B737-800 SRM 53-00-01-1A-1. ALODINED, PRIMED AND PAINTED AREA IAW B737-800 SRM 53-00-01-1A-1, AND B737-800 AMM 51-21-72.T.8224B